Thomas Mueller has vowed Bayern Munich will show Arsenal no mercy in tonight’s Champions League last-16, second-leg clash here.

The Gunners will line-up at the imposing Allianz Arena 3-1 down from the first leg and with a depleted squad after Jack Wilshere, Lukas Podolski and Bacary Sagna were ruled out due to injury.

Arsene Wenger has “rested” keeper Wojciech Szczesny and is considering leaving out Theo Walcott and Santi Cazorla with Saturday’s Premier League clash at Swansea in mind.

Wenger is hoping to create “doubt in their minds” by scoring first but Mueller (above, centre) revealed his team-mates are planning to pile on the pain for the visitors.

“I don’t have any worries we might take the match too lightly,” said the 39-cap Germany international guarding against complacency. “We will step on the gas. Even if something goes wrong in the match, we should be able to pick ourselves up.”

Manager Jupp Heynckes echoed his midfielder’s mindset citing Arsenal’s performance at the same stage of the competition last season when they almost recovered from a 4-0 first-leg defeat against AC Milan winning 3-0 in a thrilling gam at Emirates Stadium.

“They could have won 4-0, they had the chances, so it shows they are a strong team and capable of making up the gap if they have to,” said Heynckes. “I respect Arsene Wenger very much. He is a top manager and Arsenal are a fighting team.

“They will do everything to get a result here, so we must be on our guard.”

Bayern are without injured midfielder Franck Ribery, meaning former Chelsea winger Arjen Robben is likely to come into the Bundesliga leaders’ starting line-up.

Midfield powerhouse Bastian Schweinsteiger and defender Jerome Boateng are suspended but captain Philipp Lahm is confident his team will progress as long as they go on the offensive.

He said: “For Arsenal, it will be difficult. They cannot open up defensively but must still score three goals against us.

“Of course Arsenal must attack, they have to play catch up, but we must also attack, and cannot just hope to win.

“We know how good we are and we have a lot of confidence, but we do not expect to win everything.We must work hard and we must be focussed.”

Heynckes revealed he hopes his good friend Wenger can turn around Arsenal’s domestic form which has seen them go without a trophy since the 2005 FA Cup.

“He has been one of the top managers in his career and I will be sad if he is not involved anymore,” said Heynckes.